RG82855GMESL72L Datasheet, PDF (60/213 Pages) Intel Corporation – Intel® 855GM/855GME Chipset Graphics and Memory Controller Hub (GMCH)

Register Description
R
Register Name
AGP Command
AGP Control
AGP Functional Test
Aperture Translation Table Base
AGP Interface Multi Transaction
Timer
Low Priority Transaction Timer
Host Error Control/Status/Obs
Register
Symbol
AGPCMD
AGPCTRL
AFT
ATTBASE
AMTT
LPTT
HEM
Register
Start
A8
B0
B2
B8
BC
BD
F0
Register
End
AB
B1
B3
BB
BC
BD
F3
Default Value
0000 0000h
0000h
E9F0h
00000000h
00h
00h
00000000h
Access
RO, R/W
RO, R/W
R/W, R/WC
RO, R/W
R/W
R/W
RO, R/W
4.8.1
4.8.2
VID – Vendor Identification Register
Address Offset:
Default Value:
Access:
Size:
00-01h
8086h
Read Only
16 bits
The VID Register contains the vendor identification number. This 16-bit register, combined with
the Device Identification Register, uniquely identifies any PCI device. Writes to this register have
no effect.
Bit
15:0
Description
Vendor Identification (VID): This register field contains the PCI standard identification for Intel.
DID – Device Identification Register
Address Offset:
Default Value:
Access:
Size:
02-03h
3580h
Read Only
16 bits
This 16-bit register combined with the Vendor Identification register uniquely identifies any PCI
device. Writes to this register have no effect.
Bit
15:0
Description
Device Identification Number (DID): This is a 16-bit value assigned to the GMCH Host-Hub interface
bridge, Device #0.
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Datasheet